Physics MCQs for Class 9 with Answers
In large building central heating system worms on the principle of
conduction
convection
radiation
waves
Leslie cube have faces:
2
3
4
5
See breeze blows form sear to land during:
day
night
after noon
morning
On hot days cold air from sea began to move towards land:
Sea breeze
Land breeze
Both A and B
None of these
Amount of heat that flows in unit time is called:
Rate of flow of heat
Q/t
Conductivity
Both A and B
____________ from sun are major source of energy on earth.
Light
Radiation
Both a & b
None of these
Rooms are heated using gas heaters by
Conduction only
Convection and radiation
Radiation only
Convection only
Shining silvered surface is a best:
Emitter
Absorber
Reflector
None of these
What gas behaves as glass or polythene to radiation:
Nitrogen
Hydrogen
Carbon di oxide
Methane
Worst absorber of heat is:
Dull black surface
Coloured surface
Shinning silvered surface
White surface
Continue Reading Go to Next Page
Leave a Reply